Popsugar Fashion Best Friends Blair and Serena's Coordinated Outfits on Gossip Girl All the Times Blair and Serena's Coordinated Outfits Made Them TV's Most Stylish BFFs 21 May 2020 by Nikita Charuza View On One Page Photo 6 of 12 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 6 Casual Cardigans Looking preppy in cardigans and white shirts. Previous Next Start Slideshow Best FriendsScreen StyleNostalgiaGossip GirlLeighton MeesterBlake Lively